Data Metrics & Results

BAWR Reporting Sites and Target Population

Beryllium-Associated Worker Registry (BAWR) includes Reporting Organizations associated with the U.S. Department of Energy (DOE)-operated facilities. It includes DOE contractor and federal workers who:

  • Have been exposed, or have had the potential for exposure, to airborne concentrations of beryllium due to their work at the present or a previous DOE site;
  • Self-identify and indicate a history of possible exposure; or
  • Exhibit symptoms of beryllium exposure, or are receiving medical removal protection benefits.

The site’s Chronic Beryllium Disease Prevention Program (CBDPP) may also include other workers in the BAWR reporting for their site, as appropriate. Subcontractors who are not included under the main site’s CBDPP must have their own CBDPP and report data separately. The 10 CFR 850 (view report) contains further information on beryllium and beryllium-associated workers, and which organizations should have CBDPPs.

Through the 2024 calendar year, the BAWR received data from the following 30 DOE-affiliated reporting organizations:

  • Ames Laboratory (AMES)
  • Argonne National Laboratory (ANL)
  • Brookhaven National Laboratory (BNL)
  • DOE Oak Ridge Office (DOE-ORO)
  • East Tennessee Technology Park (ETTP)
  • Fermi National Accelerator Laboratory (Fermi)
  • Hanford Site (HAN)
  • Idaho National Laboratory (INL)
  • Kansas City National Security Campus (KCNSC)
  • Knolls Atomic Power Laboratory (KAPL)
  • Lawrence Berkeley National Laboratory (LBNL)
  • Lawrence Livermore National Laboratory (LLNL)
  • LLNL Clean Harbors Environmental Services (LLNL CHES)
  • LLNL North Wind (LLNL NW)
  • Los Alamos National Laboratory (LANL)
  • LANL N3B (LANL N3B)
  • Nevada National Security Site (NNSS)
  • Oak Ridge National Laboratory (ORNL)
  • Pacific Northwest National Laboratory (PNNL)
  • PNNL DGR Grand Construction (PNNL DGR)
  • PNNL Apollo Mechanical Contractors (PNNL AMC)
  • Paducah Site (PADUCAH)
  • Pantex Plant (PTX)
  • Portsmouth Gaseous Diffusion Plant (PORTS)
  • Sandia National Laboratories (SNL)
  • Savannah River Site (SRS)
  • Simmons and Golden Security, LLC (S&G)
  • SLAC National Accelerator Laboratory (SLAC)
  • Y-12 Atkins Nuclear Secured (Y-12 ANS)
  • Y-12 National Security Complex (Y‑12)

All but one of the 30 active reporting organizations collected health data through the operation of their medical surveillance programs. There is at least one site where the employees have refused medical surveillance.

Twenty-five (25) organizations conducted exposure sampling through their industrial hygiene programs.  Sixteen of these organizations reported exposure sampling in CY2024. Simmons and Golden Security, LLC (S&G) and DOE Oak Ridge Operations (DOE-ORO) do not submit exposure sampling data since their workers are in the BAWR due to prior work at another DOE site and have no potential for exposure.

There are 9 reporting organizations that previously participated in the program, but due to contract changes or work completion, no longer submit data. The previously submitted data from these organizations, referred to as inactive reporting organizations, remain in the BAWR. Years in parentheses are the years the organization actively reported to BAWR.

The inactive reporting organizations are:

  • Advanced Mixed Waste Treatment Project (AMWTP) (2005-2016)
  • LLNL Boston University (LLNL BU) (2008-2009)
  • LLNL Envirocon, Inc. (LLNL ENVC) (2010-2012)
  • National Strategic Protective Services, LLC for ETTP and ORNL (NSPS) (2008-2018)
  • Rocky Flats Closure Project (RF) (1984-2005)
  • Southwestern Power Administration (SWPA) (2002)
  • Wackenhut Security Services, Inc. for ETTP, ORNL, and Y-12 (WSI) (2002-2012)
  • Y-12 Navarro Research and Engineering (Y-12 NRE) (2007-2014)
  • Y-12 URS Corporation (Y-12 URS) (2008-2014)

  • Geographical Locations for 30 Active BAWR Reporting Organizations (2024)

    Geographical Locations for 30 Active BAWR Reporting Organizations (2024) infographic

    Click here for List of Acronyms

    This map shows the geographical locations of the 30 DOE-affiliated actively reporting organizations. 

    Ames Laboratory (AMES)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    63 63 2 0 12

    Argonne National Laboratory (ANL)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    429 197 3 0 23

    Brookhaven National Laboratory (BNL)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    83 57 1 0 48

    Fermi National Accelerator Laboratory (Fermi)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    29 21 0 0 23

    Richland Area Reporting Locations

    Hanford Site (HAN)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    26,665 16,257 124 34 2,665
    Pacific Northwest National Laboratory (PNNL)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    522 500 10 0 67
    PNNL DGR Grand Construction (PNNL DGR)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    2 2 0 0 2
    PNNL Apollo Mechanical Contractors (PNNL AMC)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    3 3 0 0 3

    Idaho National Laboratory (INL)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    1,588 537 3 0 430

    Knolls Atomic Power Laboratory (KAPL)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    86 45 0 0 39

    Los Alamos Area Reporting Locations

    Los Alamos National Laboratory (LANL)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    6,508 5,102 38 8 1,024
    LANL N3B Project (LANL N3B)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    317 233 0 0 23

    Lawrence Berkeley National Laboratory (LBNL)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    39 26 2 0 8

    Livermore Area Reporting Locations

    Lawrence Livermore National Laboratory (LLNL)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    3,125 2,060 73 4 338
    LLNL Clean Harbors Environmental Services (LLNL CHES)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    49 37 0 0 1
    LLNL North Wind (LLNL NW)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    57 48 0 0 1

    Kansas City National Security Campus (KCNSC)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    1,430 1,326 41 14 205

    Nevada National Security Site (NNSS)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    1,489 1,315 23 6 321

    Oak Ridge Area Reporting Locations

    DOE Oak Ridge Office (DOE-ORO)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    109 108 1 0 2
    Simmons and Golden Security, LLC (S&G)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    7 6 1 0 0
    East Tennessee Technology Park (ETTP)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    1,672 1,402 6 4 664
    Oak Ridge National Laboratory (ORNL)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    1,096 1,038 21 0 333
    Y-12 National Security Complex (Y-12)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    5,335 5,520 146 62 2,008
    Y-12 Atkins Nuclear Secured (Y-12 ANS)
    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    58 57 0 0 32

    Paducah Site (PADUCAH)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    383 297 6 0 93

    Pantex Plant (PTX)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    2,754 2,260 27 15 662

    Portsmouth Gaseous Diffusion Plant (PORTS)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    15 13 4 0 2

    Sandia National Laboratories (SNL)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    712 690 1 1 179

    Savannah River Site (SRS)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    2,032 956 23 7 215

    SLAC National Accelerator Laboratory (SLAC)

    Number of Workers:
    Roster BeLPT Tested Be Sensitized CBD Exposure Monitored
    97 56 0 1 26

  • Data Coordinator Changes by Reporting Organization (2017-2024)

    Data Coordinator Changes by Reporting Organization (2017-2024) infographic

    Each reporting organization designates a data coordinator who is responsible for coordinating activities at the site related to data collection, timely submittal of data, and responding to inquiries from the U.S. Department of Energy (DOE) Program Manager and the Oak Ridge Institute for Science and Education Data Center as outlined in the DOE technical standard, DOE-STD-1187-2019. The following table shows that there were 6 data coordinator changes in Calendar Year 2024. One site had more than one data coordinator change during CY2024.

    Year No. (%) of Reporting Organizations Total Data Coordinator Changes Organizations with ≥2 Data Coordinator Changes in Same Year
    2017 5 (19%) 7 2
    2018 7 (27%) 9 2
    2019 11 (41%) 12 0
    2020 4 (15%) 5 1
    2021 11 (41%) 12 1
    2022 2 (7%) 2 0
    2023 5 (19%) 7 2
    2024 5 (17%) 6 1

    Changes in data coordinators often result in the need for additional training and subsequent delays in data submissions. Therefore, significant data coordinator turnover can impact the timely acquisition of data and subsequent reporting of results.

  • Workers reported to the BAWR by Reporting Organization (2002-2024) *

    Workers reported to the BAWR by Reporting Organization (2002-2024) * infographic

    This figure shows the cumulative numbers of beryllium-associated workers reported to the Beryllium-Associated Worker Registry (BAWR) by reporting organization. Through Calendar Year 2024 (CY2024), there were 56,784 workers in the cumulative roster as compared to 50,155 workers in the cumulative roster through CY2023, for an increase of 6,629 workers. Hanford Site has 26,665 workers in the roster, constituting the largest number (47%) in the cumulative roster.

    *Some reporting organizations have provided data that predate the 2002 start date of the Registry.

  • Gender and Age Distribution for Workers (2002-2024) *

    Gender and Age Distribution for Workers (2002-2024) * infographic

    Workers are predominantly male (approximately 81%) and greater than 50 years old (52%). This chart excludes 218 workers (< 0.1%) for whom demographic data were not available.    

    *Some reporting organizations have provided data that predate the 2002 start date of the Registry.

Health Monitoring Results

Sites’ health clinics collect medical surveillance data on workers identified by their beryllium rosters.  These data sets contain beryllium-related health monitoring information and the results of any specialized medical testing.  The Site Occupational Medical Director determines the content and frequency of surveillance evaluations and tests based on policies, standards, and the worker’s health and work history.  The most vital information collected and reported on an annual basis are the number of workers monitored for beryllium sensitization (BeS) using the beryllium lymphocyte proliferation test (BeLPT), the number of new BeS cases identified, and the number of new cases of chronic beryllium disease (CBD). 

Some workers in the roster may decline testing for sensitization.  As a result, no records will be available for individuals who refuse this diagnostic evaluation.  Some workers may have testing done independently (for example, as part of a former worker program), and in these cases results may be unavailable for Registry reporting unless the worker releases their evaluation report, and it becomes part of the organization’s electronic medical records.  Also, advanced medical testing results when workers are referred (after findings suggestive of possible CBD) to a pulmonary medicine or other specialized clinic for follow-up diagnosis and care may not be reported and/or can be difficult to collect.

Sensitization and CBD Screening

The cumulative number of workers with BeLPT screening results submitted to the Beryllium-Associated Worker Registry (BAWR) through Calendar Year 2024 (CY2024) was 40,232.  This corresponds to an additional 1,661 workers tested when compared with the 38,571 workers screened through CY2023. 

There was a total of 556 sensitized workers (including 10 new sensitized workers) included in the BAWR, and medical staff diagnosed 156 workers as having CBD through CY2024.  BeS and CBD are mutually exclusive categories, (i.e., if a person who is BeS receives a CBD diagnosis, the person’s diagnosis moves to the CBD category and is no longer counted in the BeS category).

 

  • Number and Proportion of Workers undergoing BeLPT Testing and Diagnosed with BeS or Diagnosed with CBD by Reporting Organization (n=40,232) (2002–2024) *

    Number and Proportion of Workers undergoing BeLPT Testing and Diagnosed with BeS or Diagnosed with CBD by Reporting Organization (n=40,232) (2002–2024) * infographic
    Reporting Organization No. Workers with BeLPT Results No. Sensitized Workers No. Workers with CBD
    HAN 16,257 124 (0.8%) 34 (0.2%)
    Y-12 5,520 146 (2.6%) 62 (1.1%)
    LANL 5,102 38 (0.7%) 8 (0.2%)
    PTX 2,260 27 (1.2%) 15 (0.3%)
    LLNL 2,060 73 (1.7%) 4 (0.2%)
    ETTP 1,402 6 (3.1%) 4 (0.7%)
    NNSS 1,315 23 (0.4%) 6 (1.1%)
    KCNSC 1,326 41 (2.0%) 14 (0.7%)
    ORNL 1,038 21 (2.4%) 0 (0.0%)
    SRS** 956 23 (3.5%) 7 (0.0%)
    SNL 690 1 (0.1%) 1 (0.1%)
    INL 537 3 (0.6%) 0 (0.4%)
    PNNL 500 10 (2.0%) 0 (0.0%)
    PADUCAH 297 6 (2.0%) 0 (0.0%)
    LANL N3B 233 0 (0.0%) 0 (0.0%)
    ANL 197 3 (1.5%) 0 (0.0%)
    DOE-ORO 108 1 (0.9%) 0 (0.0%)
    AMES 63 2 (3.2%) 0 (0.0%)
    BNL 57 1 (1.8%) 0 (0.0%)
    Y-12 ANS 57 0 (0.0%) 0 (0.0%)
    SLAC 56 0 (0.0%) 1 (1.8%)
    LLNL NW 48 0 (0.0%) 0 (0.0%)
    KAPL 45 0 (0.0%) 0 (0.0%)
    LLNL CHES 37 0 (0.0%) 0 (0.0%)
    LBNL 26 2 (7.7%) 0 (0.0%)
    Fermi 21 0 (0.0%) 0 (0.0%)
    PORTS 13 4 (30.8%) 0 (0.0%)
    S&G 6 1 (16.7%) 0 (0.0%)
    PNNL AMC 3 0 (0.0%) 0 (0.0%)
    PNNL DGR 2 0 (0.0%) 0 (0.0%)
    Totals 40,232 556 (1.1%) 156 (0.3%)

    Click here for List of Acronyms

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

    **The new CBD case for CY2024 was at Savannah River Site.

    This table provides the numbers of beryllium-associated workers with Beryllium Lymphocyte Proliferation Testing (BeLPT) test results submitted to the Beryllium-Associated Worker Registry each year, and the total number of beryllium-sensitized (BeS) workers increased by 10 through Calendar Year 2024 (CY2024) (556 total BeS cases reported). The newly reported BeS cases were from 5 reporting organizations (1 HAN, 3 LANL, 1 LLNL, 4 PORTS, and 1 SRS). Of note, this was the first reporting year for PORTS, and the BeS cases were for prior years. This also marks the first year since CY2020 when the number of BeS cases exceeded 10 cases. 

    Twenty-one (21) of the reporting organizations have BeS workers and 11 have workers who have been diagnosed with chronic beryllium disease (CBD).

     

  • Number and Percent Proportion of Workers Undergoing BeLPT Testing, and Yielding Abnormal BeS or CBD Results (n=56,784) (2002–2024) *

    Number and Percent Proportion of Workers Undergoing BeLPT Testing, and Yielding Abnormal BeS or CBD Results (n=56,784) (2002–2024) * infographic

    This figure depicts the numbers and percentages across the U.S. Department of Energy (DOE) complex of workers screened using the BeLPT and among those workers having abnormal results, how many are sensitized or have developed CBD. Comparison with previous years’ reports show that these DOE-wide percentage distributions have remained consistent.

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

  • Percent Proportion of Workers Diagnosed as BeS by Reporting Organization (n=556) (2002–2024) *

    Percent Proportion of Workers Diagnosed as BeS by Reporting Organization (n=556) (2002–2024) * infographic

    This figure presents the distribution in percent of beryllium sensitization (BeS) cases by reporting organization.  Of the 15 reporting organizations with at least 1 reported Be sensitization, about 48.6% of total BeS cases are associated with the Y-12 and HAN sites, which also represent the largest beryllium operations in the program.

    Ten BeS cases were reported to the Registry in CY2024, representing 5 reporting organizations (1 HAN, 3 LANL, 1 LLNL, 4 PORTS, and 1 SRS).

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

  • Percent Proportion of Workers Diagnosed as CBD by Reporting Organization (n=156) (2002–2024) *

    Percent Proportion of Workers Diagnosed as CBD by Reporting Organization (n=156) (2002–2024) * infographic

    Of the 30 active sites, 11 reporting organizations have reported at least one worker diagnosed with chronic beryllium disease (CBD). This figure presents the distribution in percent for those 11 reporting organizations with workers diagnosed with CBD. Approximately 61.54% of total CBD cases are associated with the Y-12 and HAN sites.

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

    ** One new CBD case was identified in CY2024 at SRS.

  • Number and Percent of Workers Categorized by Number of Years Following Hire Date, Undergoing BeLPT and Diagnosed with BeS or Diagnosed with CBD (n=56,784) (2002–2024) *

    Number and Percent of Workers Categorized by Number of Years Following Hire Date, Undergoing BeLPT and Diagnosed with BeS or Diagnosed with CBD (n=56,784) (2002–2024) * infographic

    This figure shows the number of beryllium-associated workers categorized by years following first hire, undergoing Beryllium Lymphocyte Proliferation Testing (BeLPT) tests. This includes roster total, those screened, and those with beryllium sensitization (BeS) or chronic beryllium disease (CBD).

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

  • Number of Workers Undergoing BeLPT and Diagnosed with BeS or Diagnosed with CBD (n=40,232) (2002–2024) *

    Number of Workers Undergoing BeLPT and Diagnosed with BeS or Diagnosed with CBD (n=40,232) (2002–2024) * infographic

    This table provides the numbers of beryllium-associated workers with Beryllium Lymphocyte Proliferation Testing (BeLPT) test results submitted to the Beryllium-Associated Worker Registry each year, and the year of first positive or abnormal BeLPT result for those who were beryllium-sensitized (BeS) or diagnosed as having chronic beryllium disease (CBD). First positive or abnormal BeLPT result is an important medical surveillance sentinel, resulting in earlier or more frequent repeat testing, hence, earlier diagnosis, earlier work restrictions, and more successful treatment. It is also a criterion for eligibility for compensation and payment of medical expenses under the Energy Employees Occupational Illness Compensation Program Act (EEOICPA). Two (2) abnormal BeLPT results or 1 abnormal and 2 borderline BeLPT results are required to categorize a worker as BeS. Since a worker may choose not to have repeat BeLPT measurements, may change work and have long lags between measurements, or may not test abnormal for a period of time, the year of first BeLPT provides a more reliable metric than the year a worker becomes BeS.

    Year of BeLPT Result No. Workers Tested No. Sensitized Workers No. Workers with CBD
    <2000 708 34 11
    2000 1,629 29 17
    2001 3,236 43 17
    2002 3,968 42 16
    2003 3,968 12 6
    2004 3,814 14 3
    2005 5,115 28 6
    2006 4,860 46 9
    2007 4,578 49 5
    2008 5,072 30 7
    2009 6,219 52 2
    2010 6,892 36 2
    2011 7,920 23 0
    2012 6,172 5 0
    2013 5,574 8 0
    2014 6,008 10 1
    2015 6,049 13 0
    2016 6,060 2 0
    2017 6,683 11 0
    2018 6,768 11 2
    2019 7,044 6 0
    2020 7,280 10 0
    2021 7,982 2 0
    2022 9,425 1 0
    2023 6,444 1 0
    2024 8,026 10 1
    Year Not Reported 0 28 51

    * The number of "Workers Tested" includes all testing with results of Normal, Negative, Borderline, Positive, Abnormal, and Unsatisfactory. Workers tested periodically are included in each year they were tested. Data capture includes prior to the year 2002.

  • Number and Percent Proportion of Workers with Abnormal BeLPT Results BeS or CBD Results (n=40,232) (2002–2024) *

    Number and Percent Proportion of Workers with Abnormal BeLPT Results BeS or CBD Results (n=40,232) (2002–2024) * infographic

    The yearly average for workers developing sensitization, whose first abnormal Beryllium Lymphocyte Proliferation Test (BeLPT) results between Calendar Year 2001 (CY2001) and CY2010, was 35.  This rate dropped to an average of 7 from CY2014 to CY2024.  These results suggest that programs are serving to improve worker protection and reduce the risk of chronic beryllium disease (CBD).

    This table lists beryllium-sensitized (BeS), or CBD diagnosed workers, through CY2024 grouped by their work history activity, which is a high‑level rollup of job function. Based on the data submitted through CY2024 and as presented in the table, the majority of both reported BeS (36%) and CBD cases (39%) occurred among the broad occupational groups of Crafts and Line Operators.


    Work History Activity Workers with BeLPT Results (n=40,232) No. Sensitized Workers (n=556) Beryllium Sensitization (%)
    		 No. Workers with CBD (n=156) Chronic Beryllium Disease (%)
    Management 2,197 47 (2.1%) 8% 10 (0.5%) 6%
    Administrative Support 1,195 32 (2.7%) 6% 11 (0.9%) 7%
    In-House Professionals 2,142 42 (2.0%) 8% 15 (0.7%) 10%
    Field Professionals 3,035 50 (1.6%) 9% 8 (0.3%) 5%
    Technical Support 4,669 75 (1.6%) 14% 15 (0.3%) 10%
    Service 1,880 34 (1.8%) 6% 12 (0.6%) 8%
    Security and Fire 1,682 27 (1.6%) 5% 9 (0.5%) 6%
    Crafts 6,561 108 (1.6%) 19% 38 (0.6%) 24%
    Line Operators 3,720 93 (2.5%) 17% 23 (0.6%) 15%
    Guests 93 1 (1.1%) < 1% 0 (0.0%) 0%
    Unknown 847 14 (1.7%) 3% 11 (1.3%) 7%
    Not Reported 12,211 33 (0.3%) 6% 4 (0.1%) 3%
    Totals 40,232 556 (1.4%) 156 (0.4%)

    Click here for List of Acronyms

    *Some reporting organizations have provided data that predate the 2002 start date of the Registry.

  • Comparison of the Number and Percent Proportion of Workers Undergoing BeLPT to the Number of Workers with BeLPT Results by Reporting Organization (n=8,026) (2024)

    Comparison of the Number and Percent Proportion of Workers Undergoing BeLPT to the Number of Workers with BeLPT Results by Reporting Organization (n=8,026) (2024) infographic

    This figure compares the percent of Beryllium Lymphocyte Proliferation Tests (BeLPTs) tests conducted to the number of workers tested for each reporting organization in Calendar Year 2024.  Workers may be BeLPT tested multiple times in a year if they have abnormal or borderline results.  Therefore, the number of BeLPT tests conducted are higher than the number of workers tested.

Exposure Monitoring Results

The Beryllium-Associated Worker Registry receives beryllium-related work history and exposure data. The submission contains information about all activities with the potential for beryllium exposure including where the beryllium-associated worker currently works or previously worked, and the exposures associated with those activities. Reporting organization staff collect retrospective work history information through questionnaires and interviews with the worker or from records if accessible. This information includes location, organization, and job title for workers who work directly with beryllium, work in areas of potential beryllium exposure, even if not working directly with beryllium, and activities with potential casual exposure to beryllium, such as working near an area where others are working directly with beryllium.

Exposure Monitoring Trends - Workers

The cumulative number of workers monitored through Calendar Year 2024 (CY2024) was 9,449 compared to 8,861 workers monitored through CY2023 as reported in the Beryllium-Associated Worker Registry 2023 Dashboard. This equates to an increase of 588 workers monitored for exposure to beryllium through CY2024. 

Sixteen (16) reporting organizations provided exposure monitoring results with monitoring dates in CY2024. Organization-specific totals for a given year may change from totals in previous annual reports due to late reporting and/or corrections.

  • Number and Percent of Workers Monitored by Reporting Organization (unique workers n=4,423) (2015–2024) *

    Number and Percent of Workers Monitored by Reporting Organization (unique workers n=4,423) (2015–2024) * infographic

    Reporting Organization 2015
    n=712    		 2016
    n=697    		 2017
    n=731    		 2018
    n=685    		 2019
    n=803    		 2020
    n=708    		 2021
    n=1,092    		 2022
    n=795    		 2023
    n=739    		 2024
    N=719
    AMES 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 5 (0.6%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
    BNL 3 (0.4%) 4 (0.6%) 4 (0.5%) 1 (0.1%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
    DOE-ORO 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 2 (0.2%) 2 (0.3%) 0 (0.0%) 0 (0.0%)
    ETTP 0 (0.0%) 2 (0.3%) 0 (0.0%) 0 (0.0%) 8 (1.0%) 85 (12%) 168 (15.4%) 153 (19.2%) 157 (21.2%) 71 (9.9%)
    HAN 290 (40.7%) 265 (38.0%) 359 (49.1%) 244 (35.7%) 324 (40.3%) 211 (29.8%) 225 (20.6%) 192 (24.2%) 154 (20.8%) 238 (33.1%)
    INL 55 (7.7%) 45 (6.5%) 31 (4.2%) 62 (9.1%) 52 (6.5%) 36 (5.1%) 45 (4.1%) 32 (4.0%) 27 (3.7%) 0 (0.0%)
    KAPL 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 2 (0.3%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
    KCNSC 9 (1.3%) 9 (1.3%) 7 (1.0%) 3 (0.4%) 2 (0.2%) 4 (0.6%) 7 (0.6%) 6 (0.8%) 4 (0.5%) 7 (1.0%)
    LANL 32 (4.5%) 64 (9.2%) 49 (6.7%) 85 (12.4%) 127 (15.8%) 93 (13.1%) 50 (4.6%) 29 (3.6%) 7 (0.9%) 33 (4.6%)
    LANL N3B 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 10 (1.2%) 7 (1.0%) 5 (0.5%) 4 (0.5%) 0 (0.0%) 0 (0.0%)
    LLNL 32 (4.5%) 21 (3.0%) 19 (2.6%) 16 (2.3%) 18 (2.2%) 3 (0.4%) 6 (0.5%) 12 (1.5%) 5 (0.7%) 2 (0.3%)
    LLNL NW 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 1 (0.1%) 0 (0.0%)
    NNSS 5 (0.7%) 5 (0.7%) 1 (0.1%) 4 (0.6%) 15 (1.9%) 0 (0.0%) 0 (0.0%) 10 (1.3%) 8 (1.1%) 9 (1.3%)
    ORNL 20 (2.8%) 15 (2.2%) 11 (1.5%) 7 (1.0%) 10 (1.2%) 14 (2.0%) 28 (2.6%) 11 (1.4%) 7 (0.9%) 7 (1.0%)
    PADUCAH 0 (0.0%) 0 (0.0%) 13 (1.8%) 15 (2.2%) 5 (0.6%) 12 (1.7%) 6 (0.5%) 5 (0.6%) 2 (0.3%) 5 (0.7%)
    PNNL 7 (1.0%) 10 (1.4%) 8 (1.1%) 19 (2.8%) 9 (1.1%) 0 (0.0%) 4 (0.4%) 12 (1.5%) 6 (0.8%) 2 (0.3%)
    PNNL AMC 3 (0.4%)
    PNNL DGR 2 (0.3%)
    PORTS 1 (0.1%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
    PTX 20 (2.8%) 53 (7.6%) 27 (3.7%) 34 (5.0%) 32 (4.0%) 43 (6.1%) 42 (3.8%) 19 (2.4%) 42 (9.6%) 25 (3.5%)
    SNL 16 (2.2%) 10 (1.4%) 8 (1.1%) 3 (0.4%) 9 (1.1%) 7 (1.0%) 6 (0.5%) 9 (1.1%) 13 (3.0%) 7 (1.0%)
    SRS 2 (0.3%) 3 (0.4%) 6 (0.8%) 4 (0.6%) 3 (0.4%) 6 (0.8%) 4 (0.4%) 3 (0.4%) 4 (0.9%) 5 (0.7%)
    Y-12 206 (28.9%) 181 (26.0%) 178 (24.4%) 174 (25.5%) 156 (19.4%) 166 (23.4%) 475 (43.5%) 282 (35.5%) 30 (6.8%) 292 (40.6%)
    Y-12 ANS 15 (2.1%) 10 (1.4%) 10 (1.4%) 13 (1.9%) 18 (2.2%) 19 (2.7%) 18 (1.6%) 14 (1.8%) 9 (2.1%) 11 (1.5%)
    Totals 712 (100%)
    		 697 (100%)
    		 731 (100%)
    		 685 (100%)
    		 803 (100%)
    		 708 (100%) 1,092 (100%) 795 (100%) 739 (100%) 719 (100%)

    Click here for List of Acronyms

    * Some reporting organizations have provided data that predate the 2002 start date of the Registry

    An industrial hygienist monitored exposure for workers by reporting organization at least once in each year for the past 10 years (i.e., between 2015 and 2024). 

     

  • Number and Percent Proportion of Workers Undergoing Beryllium Exposure Monitoring by Reporting Organization (n=9,449) (2002-2024) *

    Number and Percent Proportion of Workers Undergoing Beryllium Exposure Monitoring by Reporting Organization (n=9,449) (2002-2024) * infographic

    This figure displays the cumulative 9,449 beryllium-associated workers monitored for beryllium exposure in Calendar Years 2002–2024 by reporting organization.

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

Exposure Monitoring Trends - Samples

  • Number and Percent Proportion of Exposure Sample Results by Year (n=39,948) (2015–2024) *

    Number and Percent Proportion of Exposure Sample Results by Year (n=39,948) (2015–2024) * infographic

    The numbers of exposure sampling results in the Beryllium-Associated Worker Registry (BAWR) by year monitored for each of the past 10 years are shown in the line chart.

    As can be seen, the numbers have steadily declined in recent years, with an uptick in CY2021 and CY2024. The reporting organizations that collected and submitted exposure monitoring sample data show a downward trend which, in some cases, impact the analysis and interpretation of results in BAWR. The small sample size reduces accuracy and leads to higher variability in the statistical models used for the BAWR analyses. In Calendar Year 2024, the number of exposure records submitted were higher than the 10 year average of 3,995 records.

  • Comparison of the Number and Percent Proportion of Exposure Samples to Workers with Exposure Sampling Results by Reporting Organizations (n=719) (2024)

    Comparison of the Number and Percent Proportion of Exposure Samples to Workers with Exposure Sampling Results by Reporting Organizations (n=719) (2024) infographic

    Only 16 of the 30 active sites have reported exposure samples to BAWR in CY2024. This graphic illustrates the distribution of exposure samples and workers monitored across those 16 reporting organizations during. Similar to the beryllium screening results, most workers monitored for beryllium exposure have multiple exposure measurements throughout the year. The frequency of monitoring is dependent on the worker’s specific type of work and their employer’s monitoring schemes.

    Reporting organizations submitted a total of 129,154 exposure measurements to the Beryllium-Associated Worker Registry (BAWR) through Calendar Year 2024 (CY2024). This equates to an additional 5,267 exposure sampling results collected and submitted through CY2024.

  • Number and Percent Proportion of Non-Detectable Results Exposure Measurements, Detectable Exposure Measurement Results and Exposure Measurement Status Not Reported (n=129,154) (2002–2024 ) *

    Number and Percent Proportion of Non-Detectable Results Exposure Measurements, Detectable Exposure Measurement Results and Exposure Measurement Status Not Reported (n=129,154) (2002–2024 ) * infographic

    Of the 129,154 cumulative exposure monitoring records submitted to the Registry through Calendar Year 2024 (CY2024), 91.7% have “non-detectable” results, indicating that the sample analysis results were less than the laboratory’s reporting limit. The reporting limit can vary from sample to sample because of differing flow rates of the sampling equipment used and because of the presence of other materials on the sample that can interfere with the analysis. Reporting limits typically vary from 0.01 to 0.05 µg/m3, which is one‑twentieth to one-quarter of the action level of 0.2 µg/m3.

    In comparison, 123,887 cumulative exposure monitoring results were submitted through CY2023, for an increase through CY2024 of 5,267 records (including those monitoring dates in CY2023 and earlier). This increase in sampling results is higher than the 3,680 records submitted in CY2022 and 2,734 records submitted in CY2023.

    *Some reporting organizations have provided data that predate the 2002 start date of the registry.

    **Non-detectable indicates that analysis results were reported as less than the laboratory's reporting limit.

Trends in Exposure Levels

  • Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m3 by Year (2015–2024) *

    Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Year (2015–2024) * infographic

    * Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 μg/m3 based on 95% Confidence Limits

    This figure shows the percent of DOE-wide 8-hour time weighted average (TWA) personal exposure monitoring results that exceeded the action level of 0.2 μg/m3 in each of the 10 years from Calendar Year 2015 (CY2015) to CY2024.

    Summary Statistics for 2015–2024 8-Hour Time Weighted Average Exposure Monitoring Results *
    Year 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 10-year Summary
    Number of reported monitoring results 5,065 (14.1%) 4,461 (12.4%) 3,405 (9.5%) 3,162 (8.8%) 2,793 (7.8%) 2,513 (7%) 5,556 (15.5%) 3,680 (10.3%) 2,734 (7.6%) 2,501 (7%) 35,870 (100%)
    Number of detected values 154 (11.3%) 241 (17.7%) 175 (12.8%) 240 (17.6%) 168 (12.3%) 71 (5.2%) 89 (6.5%) 77 (5.6%) 65 (4.8%) 83 (6.1%) 1,363 (100%)
    Percent non-detects 97 94.6 94.9 92.4 94 97.2 98.4 97.9 97.6 96.7 96.2
    Number of individuals monitored 711 (16.2%) 694 (15.9%) 730 (16.7%) 685 (15.7%) 803 (18.4%) 708 (16.2%) 1,092 (25%) 771 (17.6%) 723 (16.5%) 702 (16%) 4,376 (100%)
    Arithmetic mean (EX) (µg/m3) 0.014 0.016 0.842 0.368 0.165 0.021 0.147 0.043 1.749 4.048 0.105
    Lower confidence limit of EX (µg/m3) 0.005 0.008 0.128 0.100 0.39 0.003 0.010 0.005 0.031 0.093 0.062
    Upper confidence limit of EX (µg/m3) 0.039 0.031 5.521 1.349 0.708 0.141 2.280 0.409 97.417 177.069 0.178
    Observed 95th percentile of data (µg/m3) 0.004 0.005 0.006 0.020 0.011 0.001 0.001 0.001 0.001 0.001 0.004
    95% upper tolerance limit of the 95th percentile (µg/m3) 0.017 0.020 0.020 0.030 0.026 0.012 0.011 0.011 0.011 0.011 0.017
    Largest value (µg/m3) 1.847 8.865 87.419 16.712 23.084 17.340 6.609 2.897 37.536 16.368 87.419
    Percent exceeding 0.2 µg/m3 (F) 0.4 0.6 1.0 1.4 0.9 0.3 0.3 0.3 0.5 0.7 0.6
    Lower confidence limit for F 0.3 0.5 0.8 1.2 0.7 0.2 0.2 0.2 0.3 0.5 0.6
    Upper confidence limit for F 0.5 0.8 1.3 1.7 1.2 0.5 0.4 0.4 0.7 1.0 0.7

    * Many individuals were monitored in more than 1 year. The total number of individuals measured at least once in the 10-year period from CY2015 through CY2024 is 4,376. Some reporting organizations have provided data that predate the CY2002 start date of the registry. Percent exceeding 0.2 μg/m3 based on 95% Confidence Limits.

    The detailed data presented in the table above provide additional summary statistics for the DOE-wide 8-hour TWA results for each of the past 10 years.

    These statistical methods accommodate the high percentage of non-detect results (left censored) in these data sets. These analyses exclude non-detected values greater than 0.2 µg/m3. For details, see “Statistical Methods and Software for the Analysis of Occupational Exposure Data with Non-Detectable Values” Frome EL and Wambach PF, ORNL/TM-2005/52.

    Totals for an individual year may vary from previous reports due to late reporting and/or corrections. The data reported in the Beryllium-Associated Worker Registry indicate that the chronic beryllium disease prevention programs operated at DOE sites have continued to maintain a high level of compliance with the 10 CFR 850 action level of 0.2 µg/m3 over the past 10 years.

    2015

    Upper confidence limit for F: 0.5

    Percent exceeding 0.2 µg/m3 (F): 0.4

    Lower confidence limit for F: 0.3

    2016

    Upper confidence limit for F: 0.8

    Percent exceeding 0.2 µg/m3 (F): 0.6

    Lower confidence limit for F: 0.5

    2017

    Upper confidence limit for F: 1.3

    Percent exceeding 0.2 µg/m3 (F): 1.0

    Lower confidence limit for F: 0.8

    2018

    Upper confidence limit for F: 1.7

    Percent exceeding 0.2 µg/m3 (F): 1.4

    Lower confidence limit for F: 1.2

    2019

    Upper confidence limit for F: 1.2

    Percent exceeding 0.2 µg/m3 (F): 0.9

    Lower confidence limit for F: 0.7

    2020

    Upper confidence limit for F: 0.5

    Percent exceeding 0.2 µg/m3 (F): 0.3

    Lower confidence limit for F: 0.2

    2021

    Upper confidence limit for F: 0.4

    Percent exceeding 0.2 µg/m3 (F): 0.3

    Lower confidence limit for F: 0.2

    2022

    Upper confidence limit for F: 0.4

    Percent exceeding 0.2 µg/m3 (F): 0.3

    Lower confidence limit for F: 0.2

    2023

    Upper confidence limit for F: 0.7

    Percent exceeding 0.2 µg/m3 (F): 0.5

    Lower confidence limit for F: 0.3

    2024

    Upper confidence limit for F: 1.0

    Percent exceeding 0.2 µg/m3 (F): 0.7

    Lower confidence limit for F: 0.5

Exceedances Observed through 2024

  • Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m3 by Work History Activity (2002-2024) *

    Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Work History Activity (2002-2024) * infographic

    * Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 μg/m3 based on 95% Confidence Limits.

    The graphic shows the percent of 8-hour time weighted average (TWA) exposure monitoring results that exceed the action level, grouped by work activity for the cumulative data through CY2024. The detailed data in the table provide additional summary statistics for the composite 8-hour TWA results by work activity.

    For the cumulative data, the highest percentage of action level exceedances by work history activity is among workers where the work activity is unknown or not reported.

    Summary Statistics for 8-hour time weighted average (TWA) Exceeding Action Level 0.2 μg/m 3 by Work History Activity (2002-2024)*
    Work History Activity Admin. Craft Field Prof. Guests In-house Prof. Line Operator Management Security & Fire Service Tech Support Not Reported Total
    No. reported monitoring results 2,278 (1.8%) 53,640 (43.4%) 415 (0.3%) 6,521 (5.3%) 39 (0.0%) 4,566 (3.7%) 6,184 (5.0%) 14,321 (11.6%) 12,018 (9.7%) 9,662 (7.8%) 13,953 (11.3%) 123,597 (100%)
    No. detected values 62 (0.6%) 2,620 (26.9%) 16 (0.2%) 673 (6.9%) 4 (0.0%) 484 (5.0%) 595 (6.1%) 1,836 (18.8%) 1,153 (11.8%) 639 (6.6%) 1,659 (17.0%) 9,741 (100%)
    % non-detects 96.7 95.1 96.3 90.3 82.4 88.5 91.1 83.1 90.5 93.2 87.9 91.9
    No. individuals monitored 115 (1.2%) 2,910 (31.3%) 103 (1.1%) 818 (8.8%) 6 (0.1%) 385 (4.1%) 373 (4%) 1,782 (19.2%) 1,423 (15.3%) 911 (9.8%) 1,498 (16.1%) 9,299 (100%)
    Observed 95th percentile of data (µg/m 3) 0.001 0.008 0.001 0.034 0.019 0.046 0.021 0.063 0.050 0.016 0.050 0.021
    95% UTL of 95th percentile (µg/m 3) 0.038 0.050 0.050 0.058 <0.1 0.053 0.050 0.082 0.096 0.050 0.080 0.050
    Largest value (µg/m 3) 28.475 84.933 11.700 26.678 0.172 12.611 87.419 7.670 575.930 79.330 29.852 575.930
    % > 0.2 µg/m 3 (F) 1.0 0.8 1.7 1.7 0.4 2.0 1.3 1.9 2.2 1.3 1.9 1.4
    Lower confidence limit for F 0.7 0.8 0.9 1.5 0.0 1.7 1.1 1.7 2.0 1.2 1.8 1.3
    Upper confidence limit for F 1.3 0.9 2.9 1.9 3.6 2.2 1.5 2.0 2.4 1.5 2.1 1.4

    *Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 μg/m3 based on 95% Confidence Limits.

    In-House Professional

    Upper confidence limit for F: 3.6

    Percent exceeding 0.2 µg/m3 (F): 0.4

    Lower confidence limit for F: <0.1

    Craft

    Upper confidence limit for F: 0.9

    Percent exceeding 0.2 µg/m3 (F): 0.8

    Lower confidence limit for F: 0.8

    Administrative

    Upper confidence limit for F: 1.3

    Percent exceeding 0.2 µg/m3 (F): 1.0

    Lower confidence limit for F: 0.7

    Management

    Upper confidence limit for F: 1.5

    Percent exceeding 0.2 µg/m3 (F): 1.3

    Lower confidence limit for F: 1.1

    Tech Support

    Upper confidence limit for F: 1.5

    Percent exceeding 0.2 µg/m3 (F): 1.3

    Lower confidence limit for F: 1.2

    Guests

    Upper confidence limit for F: 1.9

    Percent exceeding 0.2 µg/m3 (F): 1.7

    Lower confidence limit for F: 1.5

    Field Professionals

    Upper confidence limit for F: 2.9

    Percent exceeding 0.2 µg/m3 (F): 1.7

    Lower confidence limit for F: 0.9

    Security & Fire

    Upper confidence limit for F: 2.0

    Percent exceeding 0.2 µg/m3 (F): 1.9

    Lower confidence limit for F: 1.8

    Not Reported

    Upper confidence limit for F: 2.1

    Percent exceeding 0.2 µg/m3 (F): 1.9

    Lower confidence limit for F: 1.8

    Line Operators

    Upper confidence limit for F: 2.2

    Percent exceeding 0.2 µg/m3 (F): 2.0

    Lower confidence limit for F: 1.7

    Service

    Upper confidence limit for F: 2.4

    Percent exceeding 0.2 µg/m3 (F): 2.2

    Lower confidence limit for F: 2.0

  • Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m3 by Job Title for Craft Workers (2002–2024) *

    Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Job Title for Craft Workers (2002–2024) * infographic

    This graphic shows individuals with job titles in the craft work activity category, which represents the largest occupational category in BAWR.  The detailed data through 2024 presented in the accompanying table include the summary statistics for cumulative 8-hour TWA monitoring results by craft job title.  Machinist, Deactivation & Decommissioning (D&D Worker), Electrician, Plumber & Fitter, Millwright, Carpenter, Painter, Mechanic, Waste-Management Mechanic, Iron Worker,  Sheet Metal Worker, and Heating, Ventilation, and Air Conditioning (HVAC) Mechanic individually have percent exceedances that are higher than when all crafts are combined (0.8% to 8.2% as compared to 0.7%, as shown in the table below).

    Among craft workers, HVAC Mechanic, Sheet Metal Worker, Iron Worker, Waste-Management Mechanic, and Mechanic show percentages exceeding the 0.2 µg/m3 action level that are higher than the percentages experienced by other craft workers. However, the percentage for HVAC mechanics reflects exposure monitoring results for only 45 individuals, and for sheet metal workers only 131 individuals.

    Summary Statistics for 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m 3 by Job Title (2002-2024)*
    Craft Job Title Number of reported monitoring results Number of detected values Percent non-detects Number of individuals monitored Observed 95th% of data (µg/m 3) 95% UTL of 95th% (µg/m 3) Largest value (µg/m 3) Percent exceeding 0.2 µg/m 3 (F) Lower confidence limit for F Upper confidence limit for F
    Maintenance Mechanic 758 (1%) 17 (1%) 97.8 123 (4%) 0.00 0.03 0.20 0.2 0.1 0.5
    Heavy Equipment Operator 1,423 (3%) 62 (2%) 95.6 157 (5%) 0.00 0.02 2.10 0.2 0.1 0.4
    Laborer 3,934 (7%) 80 (3%) 98.0 436 (15%) 0.00 0.04 10.34 0.2 0.1 0.3
    Welder 1,178 (2%) 42 (2%) 96.4 61 (2%) 0.01 0.02 0.36 0.3 0.1 0.5
    Insulator 171 (0%) 4 (0%) 97.7 29 (1%) 0.00 0.20 0.20 0.3 < 0.1 3.1
    Other Crafts 24,108 (45%) 688 (26%) 97.1 523 (18%) 0.00 0.02 84.93 0.4 0.3 0.4
    Hazardous Waste Worker 259 (0%) 4 (0%) 98.5 28 (1%) 0.00 0.16 0.18 0.4 0.1 2.4
    Machinist 6,845 (13%) 318 (12%) 95.4 132 (5%) 0.01 0.05 51.89 0.8 0.7 1.0
    D&D Worker 1,545 (3%) 159 (6%) 89.7 180 (6%) 0.03 0.04 2.90 1.0 0.7 1.4
    Electrician 4,834 (9%) 368 (14%) 92.4 463 (16%) 0.02 0.05 14.42 1.0 0.9 1.2
    Plumber & Fitter 3,076 (6%) 177 (7%) 94.2 305 (10%) 0.01 0.04 5.73 1.1 0.9 1.4
    Millwright 943 (2%) 52 (2%) 94.5 146 (5%) 0.01 0.05 20.18 1.6 1.1 2.3
    Carpenter 1,329 (2%) 122 (5%) 90.8 158 (5%) 0.04 0.05 3.18 1.7 1.3 2.3
    Painter 1,365 (3%) 187 (8%) 86.3 67 (2%) 0.05 0.08 7.42 1.7 1.3 2.3
    Mechanic 131 (0%) 12 (0%) 90.8 44 (2%) 0.02 0.07 0.14 2.1 0.8 4.8
    Waste-Mgmt Mechanic 178 (0%) 16 (1%) 91.0 21 (1%) 0.03 1.10 2.39 2.9 1.4 5.3
    Iron Worker 251 (0%) 30 (1%) 88.0 63 (2%) 0.12 0.32 1.85 3.1 1.8 5.0
    Sheet Metal Worker 929 (2%) 143 (5%) 84.6 131 (5%) 0.18 0.29 8.87 4.0 3.2 5.0
    HVAC Mechanic 383 (1%) 139 (5%) 63.7 45 (2%) 0.38 0.79 6.40 8.3 6.5 10.4
    All Combined Craft 53,640 (100%) 2,620 (100%) 95.1 2,910 (100%) 0.01 0.05 84.93 0.8 0.7 0.8

    * Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 μg/m 3

    Maintenance Mechanic

    Upper confidence limit for F: 0.5

    Percent exceeding 0.2 µg/m3 (F): 0.2

    Lower confidence limit for F: 0.1

    Heavy Equipment Operator

    Upper confidence limit for F: 0.4

    Percent exceeding 0.2 µg/m3 (F): 0.2

    Lower confidence limit for F: 0.1

    Laborer

    Upper confidence limit for F: 0.3

    Percent exceeding 0.2 µg/m3 (F): 0.2

    Lower confidence limit for F: 0.1

    Welder

    Upper confidence limit for F: 0.5

    Percent exceeding 0.2 µg/m3 (F): 0.3

    Lower confidence limit for F: 0.1

    Insulator

    Upper confidence limit for F: 3.1

    Percent exceeding 0.2 µg/m3 (F): 0.3

    Lower confidence limit for F: <0.1

    Other Crafts

    Upper confidence limit for F: 0.4

    Percent exceeding 0.2 µg/m3 (F): 0.4

    Lower confidence limit for F: 0.3

    Hazardous Waste Worker

    Upper confidence limit for F: 2.4

    Percent exceeding 0.2 µg/m3 (F): 0.4

    Lower confidence limit for F: 0.1

    Machinist

    Upper confidence limit for F: 1.0

    Percent exceeding 0.2 µg/m3 (F): 0.8

    Lower confidence limit for F: 0.7

    D&D Worker

    Upper confidence limit for F: 4.1

    Percent exceeding 0.2 µg/m3 (F): 1.0

    Lower confidence limit for F: 0.7

    Electrician

    Upper confidence limit for F: 1.2

    Percent exceeding 0.2 µg/m3 (F): 1.0

    Lower confidence limit for F: 0.9

    Plumber & Fitter

    Upper confidence limit for F: 1.4

    Percent exceeding 0.2 µg/m3 (F): 1.1

    Lower confidence limit for F: 0.9

    Millwright

    Upper confidence limit for F: 2.3

    Percent exceeding 0.2 µg/m3 (F): 1.6

    Lower confidence limit for F: 1.1

    Carpenter

    Upper confidence limit for F: 2.3

    Percent exceeding 0.2 µg/m3 (F): 1.7

    Lower confidence limit for F: 1.3

    Painter

    Upper confidence limit for F: 2.3

    Percent exceeding 0.2 µg/m3 (F): 1.7

    Lower confidence limit for F: 1.3

    Mechanic

    Upper confidence limit for F: 4.8

    Percent exceeding 0.2 µg/m3 (F): 2.1

    Lower confidence limit for F: 0.8

    Waste-Mgmt Mechanic

    Upper confidence limit for F: 5.3

    Percent exceeding 0.2 µg/m3 (F): 2.9

    Lower confidence limit for F: 1.4

    Iron Worker

    Upper confidence limit for F: 5.0

    Percent exceeding 0.2 µg/m3 (F): 3.1

    Lower confidence limit for F: 1.8

    Sheet Metal Worker

    Upper confidence limit for F: 5.0

    Percent exceeding 0.2 µg/m3 (F): 4.0

    Lower confidence limit for F: 3.2

    HVAC Mechanic

    Upper confidence limit for F: 10.4

    Percent exceeding 0.2 µg/m3 (F): 8.3

    Lower confidence limit for F: 6.5

  • Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m3 by Reporting Organization (2002-2024) *

    Percent of 8-hour time weighted average (TWA) Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Reporting Organization (2002-2024) * infographic

    This chart summarizes the cumulative 8-hour TWA exposure monitoring results through Calendar Year 2024 by reporting organization. The detailed data presented below include the summary statistics for the cumulative 8-hour TWA monitoring results for each reporting organization that reported workers with a percentage exceeding the action level. The percent of monitoring results exceeding the action level at Y-12, ANL, SNL, PORTS, and Fermi (ranging from 1.5 to 17.2%) were higher than the overall percent exceedances when data across all organizations are combined (1.1%).

    The graphic does not include results from AMES, HAN, KCNSC, LANL N3B, LBNL, LLNL CHES, ORNL, PADUCAH, PNNL, PNNL AMC, PTX, SLAC, SRS, and Y-12 ANS because of the small number of total samples and/or low percent exceeding the action level. Collectively, these data indicate that the majority of reporting organizations have acceptable sampling programs. However, the data also show that some organizations with ongoing beryllium activities, but small numbers of exposure monitoring samples could revisit their sampling strategies and consider increasing the volume of sampling.


    Summary Statistics for 8-hour time weighted average (TWA) Exceeding Action Level 0.2 μg/m3 by Reporting Organization (2002-2024)*
    Reporting Organization No. monitoring results No. detected values % non-detects No. individ. monitored Obs. 95th percentile (µg/m 3) 95% UTL /95th % (µg/m 3) Largest value (µg/m 3) % > 0.2 µg/m 3 (F) Lower confidence limit for F Upper confidence limit for F
    AMES 57 (0%) 3 (0.0%) 94.7 12 (1.7%) <0.1 < 0.1 0.028 < 0.1 < 0.1 91.1
    ANL 155 (0.1%) 18 (0.2%) 88.4 2 (0.3%) 0.145 1.100 2.390 4.104 2.251 7.0
    BNL 105 (0.1%) 2 (0.0%) 98.1 23 (3.3%) 0.002 0.100 0.100 0.500 < 0.1 50.0
    DOE-ORO 4 (0.0%) 0 (0.0%) 100.0 8 (1.1%) 0.007 < 0.1 0.007 < 0.1 0.000 52.7
    ETTP 4,789 (3.9%) 44 (0.5%) 99.0 71 (10.1%) 0.004 0.024 2.264 0.040 0.017 0.1
    Fermi 48 (0.0%) 22 (0.2%) 54.2 1 (0.1%) 1.296 < 0.1 4.800 17.240 10.576 26.1
    HAN 548 (0.4%) 0 (0.0%) 100.0 238 (34.0%) 0.009 < 0.1 0.200 < 0.1 < 0.1 0.5
    INL 2,329 (1.9%) 274 (2.8%) 88.2 26 (3.7%) 0.036 0.093 2.897 1.182 0.920 1.5
    KAPL 236 (0.2%) 2 (0.0%) 99.2 39 (5.6%) 0.006 0.200 0.200 0.297 < 0.1 27.4
    KCNSC 7 (0.0%) 0 (0.0%) 100.0 7 (1.0%) 0.004 < 0.1 0.005 < 0.1 < 0.1 34.8
    LANL 14,233 (11.5%) 2,741 (28.1%) 80.7 7 (1.0%) 0.040 0.054 26.678 1.087 0.988 1.2
    LANL N3B 53 (0.0%) 1 (0.0%) 98.1 23 (3.3%) 0.014 < 0.1 0.015 < 0.1 < 0.1 5.5
    LBNL 18 (0.0%) 0 (0.0%) 100.0 8 (1.1%) 0.100 < 0.1 0.100 < 0.1 < 0.1 15.3
    LLNL 6,795 (5.5%) 303 (3.1%) 95.5 330 (47.1%) 0.013 0.033 5.133 0.477 0.379 0.6
    LLNL CHES 3 (0.0%) 0 (0.0%) 100.0 1 (0.1%) 0.040 < 0.1 0.042 < 0.1 < 0.1 63.2
    NNSS 1,129 (0.9%) 94 (1.0%) 91.7 297 (42.4%) 0.010 0.052 0.317 0.7 0.416 1.0
    ORNL 13 (0.0%) 0 (0.0%) 100.0 5 (0.7%) 0.008 < 0.1 0.008 < 0.1 < 0.1 20.6
    PADUCAH 9 (0.0%) 0 (0.0%) 100.0 1 (0.1%) 0.009 < 0.1 0.011 < 0.1 < 0.1 28.3
    PNNL 245 (0.2%) 10 (0.1%) 95.9 62 (8.8%) 0.002 0.005 0.028 < 0.1 < 0.1 0.2
    PNNL AMC 1 (0.0%) 0 (0.0%) 100.0 25 (3.6%) 0.001 < 0.1 0.001 < 0.1 < 0.1 95.0
    PORTS 5 (0.0%) 2 (0.0%) 60.0 2 (0.3%) 0.376 < 0.1 0.500 8.6 < 0.1 99.7
    PTX 28 (0.0%) 0 (0.0%) 100.0 5 (0.7%) 0.010 < 0.1 0.011 < 0.1 < 0.1 10.1
    SLAC 42 (0.0%) 0 (0.0%) 100.0 26 (3.7%) 0.040 < 0.1 0.150 < 0.1 < 0.1 6.9
    SNL 1,033 (0.8%) 387 (4.0%) 62.5 11 (1.6%) 0.130 0.180 3.820 4.2 3.4 5.1
    SRS 6 (0.0%) 0 (0.0%) 100.0 5 (0.7%) 0.009 < 0.1 0.010 < 0.1 < 0.1 39.3
    Y-12 68,472 (55.4%) 5,021 (51.6%) 92.7 292 (41.7%) 0.030 0.050 87.419 1.5 1.4 1.6
    Y-12 ANS 23 (0.0%) 0 (0.0%) 100.0 11 (1.6%) 0.009 < 0.1 0.009 < 0.1 < 0.1 12.2
    All 123,595 (100%) 9,740 (100%) 92.1 701 (100%) 0.020 0.050 575.930 1.3 1.3 1.4

    Click here for List of Acronyms

    * Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 μg/m 3

    ETTP

    Upper confidence limit for F: 0.1

    Percent exceeding 0.2 µg/m3 (F): 0.04

    Lower confidence limit for F: 0.02

    KAPL

    Upper confidence limit for F: 27.4

    Percent exceeding 0.2 µg/m3 (F): 0.3

    Lower confidence limit for F: < 0.1

    LLNL

    Upper confidence limit for F: 0.6

    Percent exceeding 0.2 µg/m3 (F): 0.5

    Lower confidence limit for F: 0.4

    BNL

    Upper confidence limit for F: 50.0

    Percent exceeding 0.2 µg/m3 (F): 0.5

    Lower confidence limit for F: <0.1

    NNSS

    Upper confidence limit for F: 1.0

    Percent exceeding 0.2 µg/m3 (F): 0.7

    Lower confidence limit for F: 0.4

    LANL

    Upper confidence limit for F: 1.2

    Percent exceeding 0.2 µg/m3 (F): 1.1

    Lower confidence limit for F: 1.0

    INL

    Upper confidence limit for F: 1.5

    Percent exceeding 0.2 µg/m3 (F): 1.2

    Lower confidence limit for F: 0.9

    Y-12

    Upper confidence limit for F: 1.6

    Percent exceeding 0.2 µg/m3 (F): 1.5

    Lower confidence limit for F: 1.4

    ANL

    Upper confidence limit for F: 7.0

    Percent exceeding 0.2 µg/m3 (F): 4.1

    Lower confidence limit for F: 2.3

    SNL

    Upper confidence limit for F: 5.1

    Percent exceeding 0.2 µg/m3 (F): 4.2

    Lower confidence limit for F: 3.4

    PORTS

    Upper confidence limit for F: 99.7

    Percent exceeding 0.2 µg/m3 (F): 8.6

    Lower confidence limit for F: < 0.1

    Fermi

    Upper confidence limit for F: 26.1

    Percent exceeding 0.2 µg/m3 (F): 17.2

    Lower confidence limit for F: 10.6

  • Exposure Monitoring Results Exceeding Action Level 0.2 µg/m3 by Reporting Organization (2024) *

    Exposure Monitoring Results Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Reporting Organization (2024) * infographic

    This graphic provides the percent of exposure monitoring results that exceeded the action level by reporting organization for Calendar Year 2024 (CY2024). Fewer organizations reported exposure monitoring in recent years, and those organizations submitting data have also reported fewer sampling results. This downward trend impacts the analysis and interpretation of results in the Beryllium-Associated Worker Registry (BAWR). The small sample size reduces accuracy and causes higher variability in the statistical models used. Certainly, the wide confidence intervals in the single year CY2024 analysis demonstrate the reduction of statistical power and confidence in the interpretation when compared to similar but larger samples of the population.

    The table below gives additional summary statistics for organizations reporting exposure data to the BAWR during CY2024. Organizations that did not report data for CY2024 are not included in this table.

    The data in the graphic and table show that SNL (had the greatest percentage (4.9%) of reported exposure monitoring results exceeding the action level in CY2024.



    Summary Statistics for Exposure Monitoring Results Exceeding Action Level 0.2 μg/m3 by Reporting Organization (2024)*
    Reporting Organization No. monitoring results No. detected values % non-detects No. individ. monitored Obs. 95th percentile (µg/m3) 95% UTL /95th% (µg/m3) Largest value (µg/m3) % > 0.2 µg/m3 (F) Lower confidence limit for F Upper confidence limit for F
    ETTP 260 (10%) 2 (2%) 99.2 71 (10%) 0.005 0.017 0.250 0.2 < 0.1 29.3
    HAN 55 (22%) 0 (0%) 100 238 (33%)
    KCNSC 7 (0%) 0 (0%) 100 7 (1%)
    LANL 51 (2%) 15 (18%) 70.6 33 (5%) 0.015 NA 8.700 1.4 0.3 5.2
    LLNL 2 (0%) 0 (0%) 100 2 (0%)
    NNSS 24 (1%) 0 (0%) 100 9 (1%)
    ORNL 13 (1%) 0 (0%) 100 7 (1%)
    PADUCAH 9 (0%) 0 (0%) 100 5 (1%)
    PNNL 2 (0%) 0 (0%) 100 2 (0%)
    PNNL AMC 5 (0%) 0 (0%) 100 3 (0%)
    PNNL DGR 2 (0%) 0 (0%) 100 2 (0%)
    PTX 28 (1%) 0 (0%) 100 25 (3%)
    SNL 9 (0%) 5 (6%) 44.4 7 (1%) 0.147 NA 0.160 4.9 0.2 32.6
    SRS 6 (0%) 0 (0%) 100 5 (1%)
    Y-12 1,546 (62%) 61 (73%) 96.1 292 (41%) 0.001 0.016 16.368 0.9 0.6 1.3
    Y-12 ANS 23 (1%) 0 (0%) 100 11 (2%)
    All 2,501 (100%) 83 (100%) 96.7 719 (100%) < 0.1 0.011 16.368 0.7 0.5 1.0

    Click here for List of Acronyms

    * Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 μg/m3 based on 95% Confidence Limits

    ETTP

    Upper confidence limit for F: 29.31

    Percent exceeding 0.2 µg/m3 (F): 0.21

    Lower confidence limit for F: < 0.1

    Y-12

    Upper confidence limit for F: 1.34

    Percent exceeding 0.2 µg/m3 (F): 0.94

    Lower confidence limit for F: 0.64

    LANL

    Upper confidence limit for F: 5.20

    Percent exceeding 0.2 µg/m3 (F): 1.42

    Lower confidence limit for F: 0.29

    SNL

    Upper confidence limit for F: 32.62

    Percent exceeding 0.2 µg/m3 (F): 4.94

    Lower confidence limit for F: 0.22

  • Exposure Monitoring Results Exceeding Action Level 0.2 µg/m3 by Reporting Organization (2024)

    Exposure Monitoring Results Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Reporting Organization (2024) infographic

    This table provides the reporting organization, process description, 8-hour time weighted average (TWA), and the respirator assigned protection factor (APF) for the results observed above the action level through Calendar Year 2024 (CY2024).

    There were more exceedances for CY2024 compared to CY2023 with fifteen (15) samples exceeding the action level in CY2024, compared with 13 in CY2023, and 12 in CY2022.  Since the total reported exposure sampling results continue to decrease over time, the proportion of exceedances is greater than in previous years.  In all cases, work planning processes identified the potential for beryllium exposure and workers wore appropriate respiratory protection for the planned work.

    Reporting Organization Process Description Job Title 8-hr TWA µg/m 3 Respirator APF
    Y-12 16.37 1,000
    LANL Craft Sheet Metal Worker 8.70 1,000
    Y-12 5.73 1,000
    Y-12 2.99 1,000
    Y-12 2.65 1,000
    Y-12 1.09 1,000
    Y-12 0.89 1,000
    Y-12 0.82 1,000
    Y-12 0.64 1,000
    Y-12 0.60 1,000
    Y-12 0.50 1,000
    Y-12 0.36 1,000
    Y-12 0.32 1,000
    Y-12 0.26 1,000
    ETTP 0.25 1,000

    Click here for List of Acronyms

    * Percent exceeding 0.2 μg/m 3 based on 95% Confidence Limits.

  • Exposure Monitoring Results Exceeding Action Level 0.2 µg/m3 by Reporting Organization (2023)

    Exposure Monitoring Results Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Reporting Organization (2023) infographic

    This table provides the reporting organization, process description, 8-hour time weighted average (TWA), and the respirator assigned protection factor (APF) for the results observed above the action level through Calendar Year 2023 (CY2023).

    There were more exceedances in CY2023 compared to CY2022 with thirteen (13) samples exceeding the action level in CY2023, compared with 12 in CY2022, and 12 in CY2021.  Since the total reported exposure sampling results continue to decrease over time, the proportion of exceedances is greater than in previous years.  In all cases, work planning processes identified the potential for beryllium exposure and workers wore appropriate respiratory protection for the planned work.

    Reporting Organization Process Description Job Title 8-hr TWA µg/m 3 Respirator APF
    Y-12 Craft Machinists 37.54 1,000
    Y-12 25.98 1,000
    Y-12 1.92 1,000
    Y-12 1.67 1,000
    Y-12 1.23 1,000
    Y-12 1.11 1,000
    Y-12 0.75 1,000
    Y-12 0.66 1,000
    Y-12 0.63 1,000
    Y-12 0.50 1,000
    LANL Field Professional Research Technologist 1 0.36 1,000
    LANL Field Professional Engineering Technologist 3 0.33 1,000
    Y-12 0.23 1,000

    Click here for List of Acronyms

    * Percent exceeding 0.2 μg/m 3 based on 95% Confidence Limits.

  • Exposure Monitoring Results Exceeding Action Level 0.2 µg/m3 by Reporting Organization (2022)

    Exposure Monitoring Results Exceeding Action Level 0.2 µg/m&lt;sup&gt;3&lt;/sup&gt; by Reporting Organization (2022) infographic

    This table provides the reporting organization, process description, 8-hour time weighted average (TWA), and the respirator assigned protection factor (APF) for the results observed above the action level through Calendar Year 2022 (CY2022).

    Exceedances for CY2022 were greater than in CY2021 with twelve (12) samples exceeding the action level in CY2022, compared with 12 in CY2021, and 4 in CY2020.  Since the total reported exposure sampling results continue to decrease over time, the proportion of exceedances is greater than in previous years.  In all cases, work planning processes identified the potential for beryllium exposure and workers wore appropriate respiratory protection for the planned work.


    Reporting Organization Process Description Job Title 8-hr TWA µg/m 3 Respirator APF
    INL D&D Workers D&D Skilled Trade 2.90 1,000
    LANL

     

    		 Engineered Systems Technician 0.83 1,000
    INL D&D Workers D&D Skilled Trade 0.65 1,000
    INL Other Craft Other Craft 0.60 1,000
    INL

     

    		 Health Physics Technician 0.56 1,000
    INL D&D Workers D&D Skilled Trade 0.34 1,000
    INL D&D Workers D&D Skilled Trade 0.29 1,000
    INL Electrician Electrician 0.29 1,000
    SNL

     

    		 Technician 0.24 50
    SNL

     

    		 Technician 0.24 25
    INL Other Craft Other Craft 0.20 1,000
    Y-12

     

    		 Engineering Technician 0.20 1,000

    Click here for List of Acronyms

    * Percent exceeding 0.2 μg/m 3 based on 95% Confidence Limits.

Health and Monitoring Comparisons

Two different reporting organization groups collect the data associated with health monitoring and exposure monitoring. Occupational health and medical groups collect health monitoring data and industrial hygiene groups collect exposure monitoring data. In most cases, a data coordinator collates the data prior to submission to the Registry. In this section, the health screening data compared to the exposure monitoring data provides insight on the effectiveness of coordination between the 2 activities.

  • Comparison of the Number and Percent Proportion for Beryllium-Associated Workers Diagnosed with BeS or CBD with and without Exposure Sampling Results by Reporting Organizations (n=712) (2002-2024) *

    Comparison of the Number and Percent Proportion for Beryllium-Associated Workers Diagnosed with BeS or CBD with and without Exposure Sampling Results by Reporting Organizations (n=712) (2002-2024) * infographic

    The data in the figure shows the collective number of Beryllium Sensitized (BeS) or Chronic Beryllium Disease (CBD) individuals through Calendar Year (2024) who have had exposure monitoring results submitted to the Registry. The figure also illustrates the collective number of individuals who have not had exposure data submitted to the Registry. A combined 59% of the workers identified as either BeS or CBD do not have exposure monitoring results submitted to the Registry. Thirty-three percent of workers (182 of 556) identified as BeS and 32% of workers (83 of 156) identified as CBD have exposure monitoring results submitted to the Registry. The combined proportion of workers without exposure data in the annual summaries since 2018 averaged 68%. 

    Of the 182 sensitization cases with exposure sampling data, 118 cases only had exposure sampling data with monitoring dates later than their reported date of BeS. In other words, 65% of the BeS cases with exposure data had exposure monitoring initiated only after diagnosed as sensitized. 

    Of the 156 workers reported as diagnosed with CBD, 50 (32%) of the cases had at least one exposure sampling measurement submitted to the Registry. Industrial hygiene programs monitor workers diagnosed with CBD to ensure compliance with restricted duty. Nevertheless, of the 156 workers with CBD, only 34 (22%) CBD cases had at least one reported exposure record dated later than their date of CBD diagnosis. Of those 34 cases, 17 workers had exposure monitoring initiated only after diagnosed as CBD.

    * Some reporting organizations have provided data that predate the 2002 start date of the registry.

  • Comparison of the Percent of Workers Diagnosed with BeS or CBD with Percent Exceeding Action Level 0.2 μg/m3 by Reporting Organization (2002-2024) *

    Comparison of the Percent of Workers Diagnosed with BeS or CBD with Percent Exceeding Action Level 0.2 μg/m3 by Reporting Organization (2002-2024) * infographic

    Click here for List of Acronyms

    * Some reporting organizations have provided data that predate the 2002 start date of the registry. Percent exceeding 0.2 µg/m3 based on 95% Confidence Limits.

    The figure compares the cumulative percent of workers diagnosed as beryllium-sensitized (BeS) or with chronic beryllium disease (CBD) to the percent of exposure samples exceeding the 0.2 µg/m3 action level for each reporting agency. These data illustrate that no statistical correlation exists between the incidence of BeS/CBD and the percent of exceedances among the exposure sampling results submitted to the Registry (Pearson product moment correlation coefficient = -0.098). The lack of correlation could be due to sensitization and CBD cases associated with past work locations or conditions rather than the environment currently monitored.